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The abbr. of SHUT THE FUCK UP PLEASE. This is commonly used when used by a polite and very angry goody goody who cannot forget their manners, and involuntarily and accidentally adds please.
Ashley: lalalala
Jessica: STFU
Ashley: don't you mean STFUP?
Jessica: the hell is STFUP? STFUP?
Ashley: it means shut the fuck up please. jeez
Jessica: dork
STFUP by immaSYAUD June 27, 2009

stfuppercut 

It is a harsher version of the word stfu. It is as if u were telling someone to "stfu", but so much so that it is as if you were to uppercut them with it.
Man 1: HEY DUDE IM SO COOL!
Man 2: dude shutup.
Man 1: DUDE BUT IM SOOOOOO COOL!
Man 2: dude stfu!
Man 1: DUUUUUUUDE!!!! IM SOOOO COOL!!!!
Man 2: DUDE THATS IT!!! STFUPPERCUT!!!
stfuppercut by cornelio December 18, 2004

Stfupyafaafp 

Shut the fuck up Patrica your as flat as a fuckiñg pancake
Yo girl stfupyafaafp. Just some advice.
Stfupyafaafp by Alenathehoe October 16, 2019

STFUper powers 

The power to make people STFU (shut the **ck up)
another glorious turd of internet speak.
play on the words super powers
STFUper powers, activate! Form of Ball gag!
STFUper powers by TEEG November 4, 2009

stfuplzkthnx 

l33t for: shut the fuck up, please, ok, thanks.
A: u r teh sux0rz

B: stfuplzkthnx
stfuplzkthnx by g January 3, 2005